US1743942A - Switch - Google Patents

Description

Jan. 14, 1930.

E. VOLKMANN SWITCH Griginal Filed Nov. 24, 1926 2 Sheets-Sheet Jan. 14, 1930. E. VOLKMANN SWITCH Original Filed Nov. 24. 1926 2 Sheets-Sheet 2 L, we! 5 9 9 J fi e/9.5. 57 45 I 69 /v H 4/ T 65 f v 55 EIH 73 55 13?) 65 6f 37 23 1 5 Patented Jan. 14, 1936 UNITED STATES PATENT OFFIC ERNST VOLKMANN, OF ST. LOUIS, MISSOURI, ASSIGNOR TO W, N. MATTHEWS COR- PORATION, OF ST. LOUIS, MISSOURI, A CORPORATION OF MISSOURI swrrcn Application filed .R'ov'embei' 24, 1928, Serial No. 150,436. Renewed September 6, 1929.

This invention relates to electrical distribution apparatus and particularly to fuse switches and their mountings in containing boxes such as are used in high tension transmission lines.. The general type of switch box involved is shown in prior Patents, No. 1,288,951 and No. 1,398,335, issued to Claude L. Matthews and Walter A.-Heinrich, De cember 24, 1918, and November 29, 1921, m respectively.

The general type of fuse switch involved is shown in prior Patent No. 1,514,210, isd sued to Walter A. Heinrich, November 4, 1924.

Among the several objects of my present invention may be noted the provision of an improved combination of parts whereby the insulating mounting system for the switch is reduced to a minimum number of simple elements which can be made more ruggedly at less cost, thereby providing more continuous and satisfactory operation; and the provision of a switch of the class described which requires replacements of fewer auxiliary parts when replacements of certain insulator elements become necessary. Other objects will be in part obvious and in part pointed out hereinafter.

The invention accordingly comprises the features of construction, combinations of elements and arrangements of parts, which are exemplified in the description hereinafter in connection with the accompanying drawings, and the scope of the application of which will be indicated in the following claims.

In the accompanying drawings, in which are illustrated two of various possible embodiments of the invention,

Fig. 1 .'s a vertical section taken from front to rear of the fuse box, showing certain parts in full;

Fig. 2 is a vertical section taken on line 2-2 of Fig. 1',-certain portions being broken away to show the construction more clearly;

the piece 15.

Fig. 3 is a horizontal section taken substantially on line 3-3 of Fig. 2;

Fig. 4 is a horizontal section taken on line 44 of Fig. 1;

Figs. 5 and 6 are detail views of certain supporting clamp members, enlarged; and

Fig. 7 is a" side elevation form of insulator.

: Similar reference characters indicate similar parts throughout the several views of the rawings.

Referring now more particularly to Figs. 1 and 2, there is illustrated at 1 the back of the switch box. Sides 3 are made fast to the back 1. The upper edges of the sides slope rearwardly and a rearwardly sloping water-proof cover 5 is screwed to the top edges of the back sides. The cover 5 overhangs the box at all points to form eaves. It comprises 9. preferably wooden piece 6. a partially open bottom portion 7 is formed in the box.

On the sides 3 beneath the eaves of the cover 5 are screwed forwardly extending purchase pieces 9. These extend forwardly past and flush with a front door 11. The door 11 is suitably pivoted to the pieces 9 and swings in a vertical plane to open from the bottom, as indicated by the arrow in Fig. 1. A recess 13 formed on the interior of the door 11 accommodates certain parts within the box (to be described).

The door 11 swings forwardly on the hinge pieces and at its lower end is provided with an inwardly extending portion 15 of said bottom 7 (see Fig. 3). The portions 7 and 15 of the bottom cooperate when the door 11 is closed to close the lower end of the box except at an open slot 19. This slot 19 permits the lower open end 21 of a fuse block 23 to protrude from the box for purposes to be described. The slot is cut partially in the piece 7 and partially in Fig. 6 being of an alternative namely, to hold the clamps 25 in place on the back 1 and to hold together two halves 29 and 31 of said clamps, the said halves being adapted to clamp over and support an insulator I. The insulator is spaced with regard to the wall 1.

The shape of the halves 29 is more fully illustrated in enlarged Fig. 6. If desired, tapped holes 33 ma be used to run studs in from the rear 0 the wall 1, while the bolts 27 are shortened to perform only a clamping function. The former construction is illustrated in the drawings, however.

The insulator I preferably comprises a hollow length of porcelain, round in cross section and provided with convolutions 35. The convolutions deter current leakage. At intervals between groups of convolutions 35, cylindrical portions 39 are provided for purposes of accommodating the application of the clamps 25, and other clamps or supporting members 41, to be described.

Said other clamps or supporting members 41 each comprise a rearward saddle 43 and a forward saddle 4C5 clamped together on alternate portions 39 of the insulator I by means of screws 47 suitably threaded to the saddles 13 and passing slidably through openings in the saddles 45.

The type of forward saddle i5 is more particularly illustrated in Fig. 5 wherein is shown a raised ortion 49 having a teat 51. The teat 51 is a apted to pass through suitable aligned holes formed through a terminal piece 53 and a pair of cooperatin 0' spring terminal clips 55. The teat is riveted over to hold the terminal and clips to the clamp, thereby forming only two elements which need be clamped tothe insulator l for each terminal assembly applied.

Each terminal piece 53 is provided withv apair of laterally and downwardly extending wire sockets 57, the bores of which sub stantially align with the holes 59 of insulators 61, said insulators passing through suitable sloping openings 63 in the box. The sloping construction prevents leakage of water into the box. The parts are so proportioned that wires 65 may be fed directly through said insulators 61 to become 'socketed inthe sockets 57. The wires may be fastened by suitable screws 67 or solder. Plates 69 having suitable openings therein to permit passage of the insu ators are adapted also to prevent the insulators 61 from. falling outwardly.

Opposite each opemng 63 is formed a similar opening. 71 closed by a plate 73;

These openings 71 may be used in conjunction with or alternatively to the holes 63 for the purposes described, b substituting for the closin insulator assem lies 69, 61. i

From the above, it is evident that a single insulator supported. on a plurality of supports or brackets 29, supports a plurality of terminal clip assemblies. In the present construction, the fuse carrying member .or switch block 23, which is adapted to'coopcrate with the terminal spring clips 55 comprises two, preferably fibre, insulating tubes held together b a lower band 77, and a central band an metallic terminal piece 79. At theupper end of the longer of the two tubes, namely tube 81, is provided another metallic terminal piece '83. The terminal pieces 79 and 83 are adapted to receive in electrical connection therewith a fuse wire 85. The ends of the wire are clamped to the insides of the terminal pieces 79 and 83 by means of set screws 87. Hence it is evident that the fuse wire may be removed from the tubes merely by loosening the set screws 87 and withdrawing it from the open lower ends of the tubes. The fuse terminals 79 and,83 of the fuse or switch 23 are adapted to resiliently cooperate with the terminal spring clips 55.

In order to facilitate placement of the fuse block 23, a socket piece 89 is pivoted plates 73, t e plate-andto the forward member 31 of .the lower clips 55. The band 77 serves to position the block vertically. The band 77 is adapted to so position itself under a spur 93 associated with the clamps 25, that the reaction of a blowing fuse will not drive the fuse block or switch out of the terminals 55.

By swinging the fuse carrying block or member 7 5 with the socket 89 vertically, the terminal pieces 79 and 83 of the member 23 are thrown into contact with the clips 55 and hence'electrical connection is made between the respective clips on the insulator; These clips are. the line terminals, as described, and are now connected by means of the fuse wire 85. When it is desired to remove the block 23, a hooked insulated tool may be applied to a brid e piece 95 associated. with the terminal block 83 and the block 75 may be swung down, that is, after the door 11 has been opened. Thereafter it ma bepulled forwardly out of the socket 89. e recess 13 in the door '11 is for the purpose of clearing the brid e piece 95.

In Fig. 7.is shown a mo ed form of anaeea insulator in which the convolutions have adifierent formation, although the cylindrical portions 39 are retained. It is to be understood that the insulator need not be hollow and that it may be formed with a smooth surface, a non-cylindrical surface, a polygonal surface or other type not specifically stated herein.

Some of the advantages in this device arise from the fact that only two simple fastenings 25 support a single insulator l, which insulator supports two connectors or terminals 41. All the connections between the insulator and the fastenings therewith are removable and are not permanent molded connections. Hence, if an insulator breaks, no parts connected therewith need be thrown away because molded therewith, as all parts are removable therefrom and may be used with a new insulator. The cushioning effect of the spring clips on the terminal blocks 79, 83 prevents much insulator breakage.

From the above itwill be seen that the several objects of the invention are attained and other advanta eous results achieved.

As many modi cations of the embodiments above illustrated might be made withoutdeparting from the spirit or-scope of the.

present invention, it is intended that the above description and accompanying drawings and claims shall be interpreted as illustrative and not in a limiting sense.

I claim:

1. A switch 1 comprising a longitudinal box, supporting clamps adapted to be held to one wall of said box and to be clamped to a longitudinal insulator by means of a single set of bolts, a plurality of supporting members'on said insulator, each adapted to support a terminal and a switch rotatably supported on the lowermost one of said supporting clamps adapted to be moved to com nect said terminals. 2. A switch comprising a longitudinal box, supporting clamps adapted to be held to one wall of said box and to be clamped to a longitudinal insulator, a plurality of supporting members on said' insulator, each adapted to support a terminal and a switch rotatably supported on the lowermost one of said supporting clamps adapted to be moved to connect said terminals.

A switch comprising a longitudinal box, supporting clamps adapted to be held to one wall of said box and to be clamped to a longitudinal insulator, a plurality of sup porting members on said insulator, each adapted to -support a terminal and a switch rotatably supported on the lowermost one of said supporting clamps adapted to be moved to connect said terminals, a bottom in said box below said members having an opening therein adapted to permit projection of one portion of the switch. I

4. A switch comprising a longitudinal box, supporting clamps adapted to be held to one wall of said box and to be clamped to a longitudinal insulator, a plurality of sup I porting members on said insulator, each adapted to support a terminal and a switch rotatably supported on the lowermost one] of said supporting clamps adapted to be moved to connect said terminals, a bottom in said box below said members having an opening therein adapted to permit projection of one portion of the switch and a door on said box opposite the wall supporting insulator having a portion extending therefrom forming a part of said openin 5. A switch comprising a longitudinal box, supporting clamps adapted to be held to one wall of said box and to be clamped to a longitudinal insulator, a plurality of supporting members on said insulator, each adapted to support a terminal, a switch rotatably supported on the lowermost one oi said supporting clamps adapted to be moved to connect said terminals, the sides of said box having insulated openings, and sockets in electrical connection with said terminals and adapted to directly receive wires passing through said insulated openings.

6. A switch comprising a single insulator, a plurality of supports for the insulator engaging said jnsulator at spaced regions, supporting members onsaid insulator engaging it at other spaced regions and means for pivoting a fuse block directly to one of the first-named supports to engage said second named members. I

7. A switchcomprising an insulator, a plurality of supports for the insulator, a plurality of supporting members thereon, and means for pivoting a fuse block directly to one of the first-named supports to engage with said plurality of members.

8. A switch comprising an insulator,.two terminal supports thereon, terminals connected with the terminal supports, at least one insulator support located with respect to the length of the insulator between the said terminal supports and a switch block adapted to engage with the said terminals.

9. A switch comprising a single tubular insulator, terminal supports thereon, terminals on the terminal supports, at least one insulator support located with respect to the length of the insulator between two of said terminal supports and a fuse block pivoted so as to engage with the said terminals.

10. A switch comprising at least one insulator, a plurality of terminal supports thereon, terminals on the terminal supports, at least one insulator support located with respect to the length of the insulator between two of said terminal supports and a fuse block engaging the said terminals.

' amaeea 11. A switch comprising at least one insulator, a plurality of terminal supports thereon, terminals on the terminal supports, at least one insulator su port located with respect to the length of the insulator between two of said terminal supports and a fuse block engaging the said terminals, said. insulator support being metallic In testimony whereof, I have signed my 30 name to this specification this 18th day of November, 1926.

' ERNST VOLM/IANN.

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